1210213100 has 36 divisors (see below), whose sum is σ = 2655689400. Its totient is φ = 478642560.

The previous prime is 1210213073. The next prime is 1210213117. The reversal of 1210213100 is 13120121.

It is a super-2 number, since 2×1210213100² = 2929231494823220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59090 + ... + 76889.

It is an arithmetic number, because the mean of its divisors is an integer number (73769150).

Almost surely, 2^1210213100 is an apocalyptic number.

1210213100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210213100 is an abundant number, since it is smaller than the sum of its proper divisors (1445476300).

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

1210213100 is a wasteful number, since it uses less digits than its factorization.

1210213100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136082 (or 136075 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1210213100 is about 34788.1172241327. The cubic root of 1210213100 is about 1065.6647895234.

Adding to 1210213100 its reverse (13120121), we get a palindrome (1223333221).

The spelling of 1210213100 in words is "one billion, two hundred ten million, two hundred thirteen thousand, one hundred".