1220000102021 has 4 divisors (see below), whose sum is σ = 1226130756000. Its totient is φ = 1213869448044.

The previous prime is 1220000102017. The next prime is 1220000102081. The reversal of 1220000102021 is 1202010000221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1220000102021 - 2² = 1220000102017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220000101993 and 1220000102011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220000102081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3065326691 + ... + 3065327088.

It is an arithmetic number, because the mean of its divisors is an integer number (306532689000).

Almost surely, 2^{1220000102021} is an apocalyptic number.

It is an amenable number.

1220000102021 is a deficient number, since it is larger than the sum of its proper divisors (6130653979).

1220000102021 is an equidigital number, since it uses as much as digits as its factorization.

1220000102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6130653978.

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

Adding to 1220000102021 its reverse (1202010000221), we get a palindrome (2422010102242).

The spelling of 1220000102021 in words is "one trillion, two hundred twenty billion, one hundred two thousand, twenty-one".