1022202121021 has 2 divisors, whose sum is σ = 1022202121022. Its totient is φ = 1022202121020.

The previous prime is 1022202120991. The next prime is 1022202121037. The reversal of 1022202121021 is 1201212022201.

It is a happy number.

It is an a-pointer prime, because the next prime (1022202121037) can be obtained adding 1022202121021 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 701858572900 + 320343548121 = 837770^2 + 565989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022202121021 - 2⁹ = 1022202120509 is a prime.

It is a super-2 number, since 2×1022202121021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1022202120986 and 1022202121004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022202121621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511101060510 + 511101060511.

It is an arithmetic number, because the mean of its divisors is an integer number (511101060511).

Almost surely, 2^{1022202121021} is an apocalyptic number.

It is an amenable number.

1022202121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022202121021 is an equidigital number, since it uses as much as digits as its factorization.

1022202121021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1022202121021 its reverse (1201212022201), we get a palindrome (2223414143222).

The spelling of 1022202121021 in words is "one trillion, twenty-two billion, two hundred two million, one hundred twenty-one thousand, twenty-one".