1210041021 has 16 divisors (see below), whose sum is σ = 1844576384. Its totient is φ = 691187904.

The previous prime is 1210040999. The next prime is 1210041023. The reversal of 1210041021 is 1201400121.

It is a happy number.

It is not a de Polignac number, because 1210041021 - 2⁷ = 1210040893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210040988 and 1210041006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210041023) 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, 54291 + ... + 73263.

It is an arithmetic number, because the mean of its divisors is an integer number (115286024).

Almost surely, 2^1210041021 is an apocalyptic number.

It is an amenable number.

1210041021 is a deficient number, since it is larger than the sum of its proper divisors (634535363).

1210041021 is a wasteful number, since it uses less digits than its factorization.

1210041021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22020.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1210041021 is about 34785.6438922726. The cubic root of 1210041021 is about 1065.6142785229.

Adding to 1210041021 its reverse (1201400121), we get a palindrome (2411441142).

The spelling of 1210041021 in words is "one billion, two hundred ten million, forty-one thousand, twenty-one".