121201010212111 has 16 divisors (see below), whose sum is σ = 127320958080000. Its totient is φ = 115151942765728.

The previous prime is 121201010212097. The next prime is 121201010212187. The reversal of 121201010212111 is 111212010102121.

It is a cyclic number.

It is not a de Polignac number, because 121201010212111 - 2¹⁵ = 121201010179343 is a prime.

It is a super-2 number, since 2×121201010212111² (a number of 29 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 (121201010212211) 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, 382291320 + ... + 382608226.

It is an arithmetic number, because the mean of its divisors is an integer number (7957559880000).

Almost surely, 2^{121201010212111} is an apocalyptic number.

121201010212111 is a deficient number, since it is larger than the sum of its proper divisors (6119947867889).

121201010212111 is a wasteful number, since it uses less digits than its factorization.

121201010212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428678.

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

Adding to 121201010212111 its reverse (111212010102121), we get a palindrome (232413020314232).

It can be divided in two parts, 1212010102121 and 11, that multiplied together give a palindrome (13332111123331).

The spelling of 121201010212111 in words is "one hundred twenty-one trillion, two hundred one billion, ten million, two hundred twelve thousand, one hundred eleven".