1211010210 has 32 divisors (see below), whose sum is σ = 3229361280. Its totient is φ = 322935984.

The previous prime is 1211010209. The next prime is 1211010211. The reversal of 1211010210 is 120101121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1211010209) and next prime (1211010211).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1211010192 and 1211010201.

It is not an unprimeable number, because it can be changed into a prime (1211010211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2242342 + ... + 2242881.

It is an arithmetic number, because the mean of its divisors is an integer number (100917540).

Almost surely, 2^1211010210 is an apocalyptic number.

1211010210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211010210 is an abundant number, since it is smaller than the sum of its proper divisors (2018351070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211010210 is a wasteful number, since it uses less digits than its factorization.

1211010210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4485239 (or 4485233 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1211010210 is about 34799.5719801264. The cubic root of 1211010210 is about 1065.8987058011.

Adding to 1211010210 its reverse (120101121), we get a palindrome (1331111331).

It can be divided in two parts, 121 and 1010210, that added together give a triangular number (1010331 = T₁₄₂₁).

The spelling of 1211010210 in words is "one billion, two hundred eleven million, ten thousand, two hundred ten".