1020312002021 has 16 divisors (see below), whose sum is σ = 1122238360320. Its totient is φ = 921942544320.

The previous prime is 1020312002011. The next prime is 1020312002023. The reversal of 1020312002021 is 1202002130201.

It is a happy number.

It is not a de Polignac number, because 1020312002021 - 2³⁴ = 1003132132837 is a prime.

It is a super-2 number, since 2×1020312002021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020312001987 and 1020312002005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020312002023) 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, 4220045 + ... + 4455266.

It is an arithmetic number, because the mean of its divisors is an integer number (70139897520).

Almost surely, 2^{1020312002021} is an apocalyptic number.

It is an amenable number.

1020312002021 is a deficient number, since it is larger than the sum of its proper divisors (101926358299).

1020312002021 is a wasteful number, since it uses less digits than its factorization.

1020312002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8675516.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 1020312002021 its reverse (1202002130201), we get a palindrome (2222314132222).

The spelling of 1020312002021 in words is "one trillion, twenty billion, three hundred twelve million, two thousand, twenty-one".