1020421310202 has 36 divisors (see below), whose sum is σ = 2571878202426. Its totient is φ = 291548945520.

The previous prime is 1020421310197. The next prime is 1020421310243. The reversal of 1020421310202 is 2020131240201.

It is a happy number.

1020421310202 is a `hidden beast` number, since 10 + 2 + 0 + 421 + 31 + 0 + 202 = 666.

It can be written as a sum of positive squares in only one way, i.e., 797343629481 + 223077680721 = 892941^2 + 472311^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 578469249 + ... + 578471012.

Almost surely, 2^{1020421310202} is an apocalyptic number.

1020421310202 is an abundant number, since it is smaller than the sum of its proper divisors (1551456892224).

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

1020421310202 is a wasteful number, since it uses less digits than its factorization.

1020421310202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156940283 (or 1156940273 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1020421310202 its reverse (2020131240201), we get a palindrome (3040552550403).

The spelling of 1020421310202 in words is "one trillion, twenty billion, four hundred twenty-one million, three hundred ten thousand, two hundred two".