1021200102101 has 8 divisors (see below), whose sum is σ = 1023974503104. Its totient is φ = 1018427618880.

The previous prime is 1021200102089. The next prime is 1021200102107. The reversal of 1021200102101 is 1012010021201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021200102101 is a prime.

It is a super-2 number, since 2×1021200102101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021200102107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590216 + ... + 1546206.

It is an arithmetic number, because the mean of its divisors is an integer number (127996812888).

Almost surely, 2^{1021200102101} is an apocalyptic number.

It is an amenable number.

1021200102101 is a deficient number, since it is larger than the sum of its proper divisors (2774401003).

1021200102101 is an equidigital number, since it uses as much as digits as its factorization.

1021200102101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958891.

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

Adding to 1021200102101 its reverse (1012010021201), we get a palindrome (2033210123302).

The spelling of 1021200102101 in words is "one trillion, twenty-one billion, two hundred million, one hundred two thousand, one hundred one".