102021012101 has 2 divisors, whose sum is σ = 102021012102. Its totient is φ = 102021012100.

The previous prime is 102021012077. The next prime is 102021012127. The reversal of 102021012101 is 101210120201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92495056900 + 9525955201 = 304130^2 + 97601^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021012101 - 2²⁶ = 101953903237 is a prime.

It is a super-2 number, since 2×102021012101² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102021015101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010506050 + 51010506051.

It is an arithmetic number, because the mean of its divisors is an integer number (51010506051).

Almost surely, 2^102021012101 is an apocalyptic number.

It is an amenable number.

102021012101 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021012101 is an equidigital number, since it uses as much as digits as its factorization.

102021012101 is an evil number, because the sum of its binary digits is even.

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

Adding to 102021012101 its reverse (101210120201), we get a palindrome (203231132302).

The spelling of 102021012101 in words is "one hundred two billion, twenty-one million, twelve thousand, one hundred one".