121020021121211 has 32 divisors (see below), whose sum is σ = 122557440096000. Its totient is φ = 119494379261952.

The previous prime is 121020021121189. The next prime is 121020021121231. The reversal of 121020021121211 is 112121120020121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121020021121211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121020021121211.

It is not an unprimeable number, because it can be changed into a prime (121020021121231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32109316535 + ... + 32109320303.

It is an arithmetic number, because the mean of its divisors is an integer number (3829920003000).

Almost surely, 2^{121020021121211} is an apocalyptic number.

121020021121211 is a deficient number, since it is larger than the sum of its proper divisors (1537418974789).

121020021121211 is a wasteful number, since it uses less digits than its factorization.

121020021121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5831.

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

Adding to 121020021121211 its reverse (112121120020121), we get a palindrome (233141141141332).

The spelling of 121020021121211 in words is "one hundred twenty-one trillion, twenty billion, twenty-one million, one hundred twenty-one thousand, two hundred eleven".