1220000252121 has 80 divisors (see below), whose sum is σ = 2232549374400. Its totient is φ = 656133996672.

The previous prime is 1220000252059. The next prime is 1220000252137. The reversal of 1220000252121 is 1212520000221.

1220000252121 is a `hidden beast` number, since 122 + 0 + 0 + 0 + 0 + 2 + 521 + 21 = 666.

It is not a de Polignac number, because 1220000252121 - 2⁶ = 1220000252057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220000252094 and 1220000252103.

It is not an unprimeable number, because it can be changed into a prime (1220000252161) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 548550 + ... + 1655568.

It is an arithmetic number, because the mean of its divisors is an integer number (27906867180).

Almost surely, 2^{1220000252121} is an apocalyptic number.

It is an amenable number.

1220000252121 is a deficient number, since it is larger than the sum of its proper divisors (1012549122279).

1220000252121 is an equidigital number, since it uses as much as digits as its factorization.

1220000252121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107073 (or 1107046 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 1220000252121 its reverse (1212520000221), we get a palindrome (2432520252342).

The spelling of 1220000252121 in words is "one trillion, two hundred twenty billion, two hundred fifty-two thousand, one hundred twenty-one".