1210230021 has 48 divisors (see below), whose sum is σ = 2183038592. Its totient is φ = 580314240.

The previous prime is 1210230013. The next prime is 1210230029. The reversal of 1210230021 is 1200320121.

It is an interprime number because it is at equal distance from previous prime (1210230013) and next prime (1210230029).

It is not a de Polignac number, because 1210230021 - 2³ = 1210230013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210229979 and 1210230006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210230029) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14715 + ... + 51351.

Almost surely, 2^1210230021 is an apocalyptic number.

1210230021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210230021 is a deficient number, since it is larger than the sum of its proper divisors (972808571).

1210230021 is a wasteful number, since it uses less digits than its factorization.

1210230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36682 (or 36671 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1210230021 is about 34788.3604241419. The cubic root of 1210230021 is about 1065.6697561500.

Adding to 1210230021 its reverse (1200320121), we get a palindrome (2410550142).

The spelling of 1210230021 in words is "one billion, two hundred ten million, two hundred thirty thousand, twenty-one".