121011121002021 has 16 divisors (see below), whose sum is σ = 171474319742400. Its totient is φ = 75646284247808.

The previous prime is 121011121002019. The next prime is 121011121002059. The reversal of 121011121002021 is 120200121110121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121011121002021 - 2¹ = 121011121002019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011121502021) 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, 4410334011 + ... + 4410361448.

It is an arithmetic number, because the mean of its divisors is an integer number (10717144983900).

Almost surely, 2^{121011121002021} is an apocalyptic number.

It is an amenable number.

121011121002021 is a deficient number, since it is larger than the sum of its proper divisors (50463198740379).

121011121002021 is a wasteful number, since it uses less digits than its factorization.

121011121002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8820695748.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121011121002021 its reverse (120200121110121), we get a palindrome (241211242112142).

The spelling of 121011121002021 in words is "one hundred twenty-one trillion, eleven billion, one hundred twenty-one million, two thousand, twenty-one".