1022021220121 has 32 divisors (see below), whose sum is σ = 1150917672960. Its totient is φ = 899574638400.

The previous prime is 1022021220113. The next prime is 1022021220149. The reversal of 1022021220121 is 1210221202201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1022021220121 - 2³ = 1022021220113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1022021220095 and 1022021220104.

It is not an unprimeable number, because it can be changed into a prime (1022021221121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36446376 + ... + 36474406.

It is an arithmetic number, because the mean of its divisors is an integer number (35966177280).

Almost surely, 2^{1022021220121} is an apocalyptic number.

1022021220121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1022021220121 is a deficient number, since it is larger than the sum of its proper divisors (128896452839).

1022021220121 is a wasteful number, since it uses less digits than its factorization.

1022021220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28845.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1022021220121 its reverse (1210221202201), we get a palindrome (2232242422322).

The spelling of 1022021220121 in words is "one trillion, twenty-two billion, twenty-one million, two hundred twenty thousand, one hundred twenty-one".