1020921702190 has 32 divisors (see below), whose sum is σ = 1988962315200. Its totient is φ = 375061446144.

The previous prime is 1020921702127. The next prime is 1020921702191. The reversal of 1020921702190 is 912071290201.

It is a happy number.

It is a super-2 number, since 2×1020921702190² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020921702191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19705899 + ... + 19757638.

It is an arithmetic number, because the mean of its divisors is an integer number (62155072350).

Almost surely, 2^{1020921702190} is an apocalyptic number.

1020921702190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1020921702190 is a deficient number, since it is larger than the sum of its proper divisors (968040613010).

1020921702190 is a wasteful number, since it uses less digits than its factorization.

1020921702190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39463756.

The product of its (nonzero) digits is 4536, while the sum is 34.

Adding to 1020921702190 its reverse (912071290201), we get a palindrome (1932992992391).

The spelling of 1020921702190 in words is "one trillion, twenty billion, nine hundred twenty-one million, seven hundred two thousand, one hundred ninety".