1210022000021 has 8 divisors (see below), whose sum is σ = 1216993227840. Its totient is φ = 1203070776768.

The previous prime is 1210021999981. The next prime is 1210022000041. The reversal of 1210022000021 is 1200002200121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1210022000021 - 2⁶ = 1210021999957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1210021999966 and 1210022000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210022000041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4879811 + ... + 5121776.

It is an arithmetic number, because the mean of its divisors is an integer number (152124153480).

Almost surely, 2^{1210022000021} is an apocalyptic number.

It is an amenable number.

1210022000021 is a deficient number, since it is larger than the sum of its proper divisors (6971227819).

1210022000021 is a wasteful number, since it uses less digits than its factorization.

1210022000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10002283.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1210022000021 its reverse (1200002200121), we get a palindrome (2410024200142).

The spelling of 1210022000021 in words is "one trillion, two hundred ten billion, twenty-two million, twenty-one", and thus it is an aban number.