1021021021010 has 16 divisors (see below), whose sum is σ = 1887509131416. Its totient is φ = 397370343168.

The previous prime is 1021021020991. The next prime is 1021021021021. The reversal of 1021021021010 is 101201201201.

It can be written as a sum of positive squares in 4 ways, for example, as 1007431756681 + 13589264329 = 1003709^2 + 116573^2 .

It is a super-2 number, since 2×1021021021010² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1021021020982 and 1021021021000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1379757767 + ... + 1379758506.

Almost surely, 2^{1021021021010} is an apocalyptic number.

1021021021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021021021010 is a deficient number, since it is larger than the sum of its proper divisors (866488110406).

1021021021010 is a wasteful number, since it uses less digits than its factorization.

1021021021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2759516317.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021021021010 its reverse (101201201201), we get a palindrome (1122222222211).

The spelling of 1021021021010 in words is "one trillion, twenty-one billion, twenty-one million, twenty-one thousand, ten".