102002001001221 has 16 divisors (see below), whose sum is σ = 136204915904640. Its totient is φ = 67900285158720.

The previous prime is 102002001001211. The next prime is 102002001001249. The reversal of 102002001001221 is 122100100200201.

It is not a de Polignac number, because 102002001001221 - 2⁵ = 102002001001189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102002001001197 and 102002001001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102002001001211) 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, 3954370 + ... + 14820291.

It is an arithmetic number, because the mean of its divisors is an integer number (8512807244040).

Almost surely, 2^{102002001001221} is an apocalyptic number.

It is an amenable number.

102002001001221 is a deficient number, since it is larger than the sum of its proper divisors (34202914903419).

102002001001221 is a wasteful number, since it uses less digits than its factorization.

102002001001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18777356.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102002001001221 its reverse (122100100200201), we get a palindrome (224102101201422).

The spelling of 102002001001221 in words is "one hundred two trillion, two billion, one million, one thousand, two hundred twenty-one".