2121200120029 has 2 divisors, whose sum is σ = 2121200120030. Its totient is φ = 2121200120028.

The previous prime is 2121200119991. The next prime is 2121200120051. The reversal of 2121200120029 is 9200210021212.

It is an a-pointer prime, because the next prime (2121200120051) can be obtained adding 2121200120029 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2046287335225 + 74912784804 = 1430485^2 + 273702^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121200120029 - 2¹⁵ = 2121200087261 is a prime.

It is a super-2 number, since 2×2121200120029² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2121200119991 and 2121200120009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121200120089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060600060014 + 1060600060015.

It is an arithmetic number, because the mean of its divisors is an integer number (1060600060015).

Almost surely, 2^{2121200120029} is an apocalyptic number.

It is an amenable number.

2121200120029 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121200120029 is an equidigital number, since it uses as much as digits as its factorization.

2121200120029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 2121200120029 in words is "two trillion, one hundred twenty-one billion, two hundred million, one hundred twenty thousand, twenty-nine".