1220217542151 has 4 divisors (see below), whose sum is σ = 1626956722872. Its totient is φ = 813478361432.

The previous prime is 1220217542069. The next prime is 1220217542153. The reversal of 1220217542151 is 1512457120221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220217542151 - 2¹³ = 1220217533959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220217542153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203369590356 + ... + 203369590361.

It is an arithmetic number, because the mean of its divisors is an integer number (406739180718).

Almost surely, 2^{1220217542151} is an apocalyptic number.

1220217542151 is a deficient number, since it is larger than the sum of its proper divisors (406739180721).

1220217542151 is an equidigital number, since it uses as much as digits as its factorization.

1220217542151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406739180720.

The product of its (nonzero) digits is 11200, while the sum is 33.

The spelling of 1220217542151 in words is "one trillion, two hundred twenty billion, two hundred seventeen million, five hundred forty-two thousand, one hundred fifty-one".