1212021111121 has 8 divisors (see below), whose sum is σ = 1232827243200. Its totient is φ = 1191387644400.

The previous prime is 1212021111113. The next prime is 1212021111131. The reversal of 1212021111121 is 1211111202121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212021111121 - 2³ = 1212021111113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212021111095 and 1212021111104.

It is not an unprimeable number, because it can be changed into a prime (1212021111101) 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, 43152181 + ... + 43180258.

It is an arithmetic number, because the mean of its divisors is an integer number (154103405400).

Almost surely, 2^{1212021111121} is an apocalyptic number.

It is an amenable number.

1212021111121 is a deficient number, since it is larger than the sum of its proper divisors (20806132079).

1212021111121 is a wasteful number, since it uses less digits than its factorization.

1212021111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86332679.

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

Adding to 1212021111121 its reverse (1211111202121), we get a palindrome (2423132313242).

The spelling of 1212021111121 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred eleven thousand, one hundred twenty-one".