121221201101012 has 24 divisors (see below), whose sum is σ = 219100506437736. Its totient is φ = 58652387808768.

The previous prime is 121221201100969. The next prime is 121221201101053. The reversal of 121221201101012 is 210101102122121.

It can be written as a sum of positive squares in 4 ways, for example, as 53494654512016 + 67726546588996 = 7314004^2 + 8229614^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3916409993 + ... + 3916440944.

It is an arithmetic number, because the mean of its divisors is an integer number (9129187768239).

Almost surely, 2^{121221201101012} is an apocalyptic number.

It is an amenable number.

121221201101012 is a deficient number, since it is larger than the sum of its proper divisors (97879305336724).

121221201101012 is a wasteful number, since it uses less digits than its factorization.

121221201101012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7832851067 (or 7832851065 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121221201101012 its reverse (210101102122121), we get a palindrome (331322303223133).

The spelling of 121221201101012 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred one million, one hundred one thousand, twelve".