102021211001001 has 4 divisors (see below), whose sum is σ = 136028281334672. Its totient is φ = 68014140667332.

The previous prime is 102021211000991. The next prime is 102021211001023. The reversal of 102021211001001 is 100100112120201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 102021211001001 - 2¹³ = 102021210992809 is a prime.

It is a super-2 number, since 2×102021211001001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102021211005001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17003535166831 + ... + 17003535166836.

It is an arithmetic number, because the mean of its divisors is an integer number (34007070333668).

Almost surely, 2^{102021211001001} is an apocalyptic number.

It is an amenable number.

102021211001001 is a deficient number, since it is larger than the sum of its proper divisors (34007070333671).

102021211001001 is an equidigital number, since it uses as much as digits as its factorization.

102021211001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34007070333670.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 102021211001001 its reverse (100100112120201), we get a palindrome (202121323121202).

The spelling of 102021211001001 in words is "one hundred two trillion, twenty-one billion, two hundred eleven million, one thousand, one".