1022021112042 has 48 divisors (see below), whose sum is σ = 2561209560000. Its totient is φ = 288487884096.

The previous prime is 1022021111953. The next prime is 1022021112043. The reversal of 1022021112042 is 2402111202201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1022021112043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48852667 + ... + 48873582.

It is an arithmetic number, because the mean of its divisors is an integer number (53358532500).

Almost surely, 2^{1022021112042} is an apocalyptic number.

1022021112042 is an abundant number, since it is smaller than the sum of its proper divisors (1539188447958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1022021112042 is a wasteful number, since it uses less digits than its factorization.

1022021112042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97726347 (or 97726344 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1022021112042 its reverse (2402111202201), we get a palindrome (3424132314243).

The spelling of 1022021112042 in words is "one trillion, twenty-two billion, twenty-one million, one hundred twelve thousand, forty-two".